The point is it that you do not want to "operate on a sick patient."
这里的要点是,您并不希望“对病恹恹的人进行手术”。
Do not experiment again if any electrical equipment fails to operate. You should contact authorized personnel immediately.
任何电器假如出了故障,不答应再试,应当立即往找授权的专业职员。
Do not operate those machines which you have not been trained to use.
不要操作那些你没有被教导操作过的机器。
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